I'm planning to overhaul my bike soon. I am also planning on replacing the free bearings (hubs and headset). Will be replacing the BB30 bearings later.
Question 1. Would replacing the bearings ahead of any visible wear be worthwhile in order to stay ahead of cone/cup wear?
Question 2. Is there such a thing as "top quality" steel ball bearings, and is it worthwhile getting those? If so, what type/brand should I be looking for?